Participants were evaluated with echocardiology and 201-thallium scintigraphy to determine left ventricular ejection fraction (LVEF), myocardial perfusion, and viability.

• 受试者以心脏超音波及铊201放射同位素计数器，来确定左心室射出分率（LVEF）、心肌灌流、与存活率；